What is a LUT (and how do you use a LUT)?

A Look-Up Table (LUT) is mathematically precise way of taking specific RGB image values form a source image – and modifying them to new RGB values by changing the hue, saturation and brightness values of that source image. A LUT can be scientifically precise (such as moving from the sRGB color space to the DCI P3 Color Space). A LUT can also be used creatively to impose a specific ‘Look’ on a source image, such as the Bleach Bypass look.

When reading about LUTs you’d think that there must be one single perfect LUT for whatever operation you’re performing… for instance, taking the LOG-recorded images from a Digital Cinema Camera and turning them into properly viewable High-Definition images.

You’d also think any LUT that comes from a camera manufacturer or that ships with your color grading software is a precise (and perhaps fool-proof) method of getting your ‘flat’ LOG images into a nice rich HD image.

Applying a 3D LUT in Adobe Photoshop

1. Make sure your Layers panel is visible

Make sure your Layers panel is visible by going to Window > Layers. If there’s a check mark next to Layers, go to step 2. If not, click on Layers to make the Layers panel visible.

2. Create a new Color Lookup Adjustment Layer

Click on the New Adjustment Layer button and choose Color Lookup.

This will create a new Color Lookup adjustment layer that will allow you to apply a 3D LUT to your image.

3. Double click the Load 3D LUT option inside the Properties window

Click the Load 3D LUT… option to open the drop-down menu and click it once again to open a dialog box that lets you choose a 3D LUT to apply to your image.

4. Select the appropriate 3D LUT

Navigate to your Lutify.me 3D LUTs package folder and choose the appropriate 3D LUT to apply to your image.

5. Repeat the process for more LUTs
Should you wish to apply more 3D LUTs, repeat steps 2-4.